Zen is not supposed to be understood with words and ideas. It’s said to be an experience outside of scriptures and philosophy.
But without a realized teacher in front of us to provide that non-conceptual nudging toward truth — how can we ever realize it?
The books describing the path will leave us more confused than empowered to practice.
In this situation, we simplify.
What are the causes and conditions to become awake, so much that we can’t ever fall back into our delusions?